US 41 over Des Plaines River
FairLake County, Illinois · 0.7 M S of Il 21 · Structure no. 049002900000000
- Built
- 1936
- 89 years old, rebuilt 1981
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 152 ft
- 3 main spans
- Daily traffic
- 21,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 41 over Des Plaines River is a steel continuous stringer/multi-beam or girder carrying US 41 over Des Plaines River in Lake County, Illinois. It was built in 1936 and reconstructed in 1981, so it is 89 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 21,100 vehicles a day, roughly 12% of them trucks, projected to reach 18,584 by 2046. The structure is 152 ft (46.3 m) long and 83 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 41 over Des Plaines River built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1981.
What condition is US 41 over Des Plaines River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.
How much traffic does US 41 over Des Plaines River carry?
About 21,100 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is US 41 over Des Plaines River?
The structure is 152 ft (46.3 m) long with a longest span of 55 ft (16.8 m) and a deck 83 ft wide.
Who owns US 41 over Des Plaines River?
It is owned by the State Highway Agency.